Reversing mechanism.



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fully explained hereinafter.

UNITED STATES` PATENT OFFICE;

JOSEPH LIZOTTE, OEOQU'INOY, MASSACHUSETTS, ASSIGNOR OFONE-HA'LE To MELLEN N. BRAY, OE BOSTON, MASSACHUSETTS.

Aliu-:VERslNe--MECHANISM.-

SPECIFICATION forming part of Letters r Patent No. 700,432, dated May 20, 1902. Application filed February 13,1902. Serial No. 93,867. (No model.)

To all whom it may concern: l

Be it known that I, JOSEPHVLIZOT'TE, of Quincy, in the county of Norfolk and State of Massachusetts, have invented Y certain new and useful Improvements in Reversing Mechanism, of which the following is a specification. l y The inventionvrelates to reversing mechanism for driving a shaft injeitherdirection from a driving-shaft A,which isin axial yaline-Vy ment with the drivenshaft and rotates in but', one direction'. l,This class of mechanism may I be used'in Various relationsand isespecially useful in connection witlfsmallgas or otherV engines which are not conveniently reversed( The object of theinventionV is to providel a simple and ecient'reversing mechanism,l which is inexpensivel and "compactinconi struction and which may be conveniently operatcd and adjusted. Y

The mechanism comprises two bevel-gears secured to the driving anddriven'shafts,re spectively, a support "which carries vone or` more intermediate gears connecting these two gears and whichjmay be held ystationary or allowed to revolve, as the casemaybe, and a clutch for connecting the two gears'together4 when the shafts are to rotat'ein` the samedirection. The clutch is arranged between the bevel-gears and is operated ,through a rod mounted in the hollow centerV of onefof the shafts. This arrangement and inannerof operating the clutch contribute to the'simplicity and efficiency of the mechanism 4and are important features of the invention. The support for the intermediate gear or gears is in the form of a cylindrical drur'nwhich surrounds the gearing and clutch andin connection with the disks on which the drum is mounted forms a casing which incloses these parts and effectivelyprotects them and enables the mechanism tolbe employed with advantage and to act efficiently underthe unfavorable conditions7 such as are metwith where gas-engines are frequently employed.

- A furtherfeature of,invention consists in an arrangement whereby theigrip of the clutch maybe readily adjusted without dismantling the mechanism, as will be more These features as well as the other features will be madeclear by a description of the mechanism in which I have embodied the various features of the invention, which mechanism is shown in the accompanying drawings.

In the drawings, Figure 1 is alongitudinal sectional view* through the center of the mechanism. Fig. 2.is an elevation of the driving-shaft. Fig. 3 is a transverse sectional elevation on line 8 3, Fig. l, looking toward v Athe left. I Fig. 4 is a partial sectional View through the cylindrical drum which supports ,the intermediate vgears on line 4 4, Fig. 1,

looking toward the right ;l and Fig. 5 is a de- .tail of the end of the clutch-operating rod.

In the construction shownAis the drivingshaft, which maybe connected with the crank-shaft a of a gas-engine or to any other source of power by a coupling a', and B is the driven shaft, which may be connected with the reversing mechanism through a coupling-flange b. When the shafts A and B are B2, secured,respe'ctively,`to the shafts A and B and 'connectediby intermediate gears C, mounted `upon a carrier C', which at this time is held'stationary,',but which is released and isv free torevo'lve with the gears A2 and B2 when the clutch is engaged. w

The gear'A2is secured totheshaft A by being attached Ito a disk A3, whi'chis secured to the shaft "A, and the gear B2 is securedto the` shaft B by being attachedto asimilar disk B3, which is mounted on the end of, the shaft A and is secured toishaft B through coupling b. These disks A2 "and B3 are provided with annular grooves on the outer edges in which the ends of the suipporting'-l fdrum C fit, and these disksandthe lice form a casing surrounding the gearing and l lower end of lever D2. lVhen the lever is clutch. The clutch-sleeve B' is secured to the inner face of the gear B2, and the clutchshoes A' are in the form of a split sleeve projecting from the inner face of the gear A2, parts of the sleeve being cut away to enable the shoes A'to be more easily sprung outward against the inner surface of the sleeve B.

The clutch members are engaged and disengaged through a sliding rod D, mounted in the shaft A, which is made hollow to receive it. At the inner end this rod carries a screw D', which projects radially outward through slots in the shaft A and is arranged to engage the arm E of a lever E', which operates the clutch-shoes A'. The lever E' is provided with a yoke at the forward end which embraces the shaft A, and the arms of this yoke are provided with lugs E2, which lie in recesses Al between the shoes A. Then the rod is advanced, as indicated in Figs. l and 2, the lugs rest freely in the recesses and the shoes A' spring in out of engagement with the sleeve B'. Vhen the rod is moved toward the left, however, the end of the screw D' engages the arm E of the lever E' and acts as a cam for forcing said arm outward. This movement turns the lugs E2 in the recesses A4, and thereby spreads the shoes A' outward into engagement with the sleeve B'. By adjusting the screw D' the grip of the clutch may be regulated to suit the requirements or to compensate for wear. To enable the adjustment of the screw D' without taking the mechanism apart, the sleeves A' and B' and the drums C' are provided with openings A5 B5 C5,which may be brought into alinement with each other and with the head of screw D. The openings thus positioned allow access to the screw, so that it may be adjusted by inserting a screw-driver through the openings. A plug Ci is normally screwed into the opening Ci to close the same. The screw D' is held firmly in its adjusted position by the clamping action of the rod, which is split, as indicated in Fig. 5.

' The rod D is moved to engage and disengage the clutch by a lever D2, having pins D2, which ride in an annular groove D4, formed in a sleeve D5, which is mounted on the shaft A and is connected with the rod D by a pin D".

When the clutch is en gaged,the supportingdrum C' is free to revolve with the disks A3 B3 and gears A2 B2. lVhen the shafts A and B are to revolve in opposite directions, however, the drum C is held stationary by a clamping-strap C2,which surrounds the drum. rlhe ends of this strap are provided with ears C3 C, which lie on opposite sides of a fixed arm C7. A bolt Cs passes through the ears C3 C4 and through a slot in the arm C7. An arm C2 is mounted between the head of this bolt and the ear C2, and is provided with. a cam C10, arranged to cooperate with a similar cam on the ear C1 when the arm is turned. The arm is connected by a link C with the thrown into the position shown, the arm C is turned so that cams C10 act to draw the ends of the clamping-ring together, and thus hold the drum C' stationary. When the lever D2 is moved toward the left, the arm C is moved so that the ends of the clamping-ring may spring apart, thus releasing the drum C'..

While I have referred to the shaft A as the driving-shaft and to the shaft B as tho driven shaft, it will be understood that either shaft may be the driver without affecting the mode of operation of the mechanism.

What I claim, and desire to secure by Letters Patent, is-

l. In a reversing mechanism the combination of two bevel-gears, a clutch arranged between said gears for directly connecting the same, a support, one or more intermediate gears engaging said bevel-gears carried by said support, means for engaging and disengaging said clutch, and means for holdingv and releasing said support, substantially as described.

2. In a reversing mechanism the combination of a hollow shaft, a bevel-gear secured thereto, a second bevel-gear, a clutch between said gears for directly connecting the same, a rod mounted in said shaft for operating the clutch, a support mounted to rotate with said gears, one or more intermediate gears engaging said bevel-gears carried by said support, and means for holding said support stationary, substantially as described.

3. In a reversing mechanism the combination of a hollow shaft, a second shaft, mechanism for driving one shaft from the other but in a reverse direction, clutch-shoes secured to the hollow shaft, a clutch-sleeve surrounding said shoes and connected to said second shaft, a lever for operating said shoes, a rod mounted in said hollow shaft, and a cam for' operating said lever carried by said rod, substantially as described.

4. In a reversing mechanism the combination of two bevel-gears, a cylindrical clutchsleeve secured to one gear, clutch-shoes secured to the other gear, a drum surrounding said gears, an intermediate gear engaging said gears carried by said drum, an adjustable cam within said clutch-shoes for operating the same, one of said shoes having an opening in line with said cam, and said sleeve and drum having openings arranged to be brought into alinement with said cam, substantially as described.

5. In a reversing mechanism the combination of gears A2, B2, a clutch-sleeve B' secured to gear B2, a split sleeve A' secured to gear A2, means for expanding the split sleeve A', a support C', intermediate gear C carried thereby, and means for holding said support stationary, substantially as described.

6. In a reversing mechanism the combination of disks A2, B2, gears A2, B2 secured thereto, clutch-sleeves A', B', means for expandroo tog

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ing sleeve A ,drum C', gears C, carried therel a rodl), a cam DI en said rod fer engaging the 11o by, andmeans forholding drum Cstationaly, arm E of the Alever E', substantially as desubstantially as described. scribed. c l

7. In a reversing mechanism, the combna- In testimonywhereof I have axed my sig- 5 tion of gears A2 B2, a support C', intermediate nature in presence vof twowitnesses.

gears Ocarried thereby,jciutch-s1eeve B' and 'y e JOSEPH LIZOTTE. split sleeve A,av1everfE provided With'lugs Witnesses: A E2, the parts of sleeve A having recesses be- -IRA L. FISH,` tween them in which the lugs E2 are located, GEO. N. GODDARD. 

